Comparison plots: Here
This PR: Here
Current Master: Here

Given that Philip is probably busy, I'll leave it to them to open a PR later on if this configuration doesn't work on their machine. Example timing on the Cornell machine given below. @VourMa This PR should be good to merge in.

Just added Andrea's last commit which was pushed recently. We should be good to merge this in now.

Hi Gavin, sorry for the late review and thank you for the efforts! I checked the external LST package and it runs smoothly. However, I met an error when compiling the LST set up as CMSSW external.

When I did scram b -j 12, after the cms-checkdeps in README, it says:
/home/users/yagu/TrackLooper_Ntuple/test_PR314/workingFolder/CMSSW_13_0_0_pre4/src/RecoTracker/LST/plugins/alpaka/LSTProducer.cc:46:43: error: cannot bind non-const lvalue reference of type 'CUstream_st*&' to an rvalue of type 'CUstream_st*'
46 | lst_.run(ctx.queue().getNativeHandle(),

I'm not sure if the error comes with issues in this PR, but it would be nice if you have any ideas.

@YonsiG This is something not in the readme yet, but you need to remove the .getNativeHandle() from LSTProducer.cc

Or you can use the Alpaka integration branch where this is fixed

@YonsiG This is something not in the readme yet, but you need to remove the .getNativeHandle() from LSTProducer.cc

Or you can use the Alpaka integration branch where this is fixed

Thanks Gavin. Can you put this in the README also? Or what is the consequence of removing this line in the LSTProducer.cc directly if it causes issues not only in the Alpaka branch?

@YonsiG Just updated the README as you suggested. The CMSSW integration steps should work now.

Thanks Gavin, I tested the codes on external packages, and test the CMSSW integration with cmsRun. Everything works smoothly on my side. Thanks for contribution and PR merged!